I am pulling my hair out and hope someone can point me in the right direction. I purchased an airport Express a couple months ago. Fantastic. Use it to wirelessly stream music from my laptop iTunes to my stereo. No problems. Out of the blue, today I start getting this error msg within iTunes as soon as I try to send music to the Express ... "An unknown error occurred (-15000)". I have done everything I can think of, up to and including; * Check all s/w versions are up to date - they are * tried to download latest Airport firmware, mine is apparently already up to date * Did a soft reset on the airport Express * Did a complete reset All to no avail. As usual, the Apple Support site is completely useless. Does anyone know what is going on?